Boiler



g- 1932- c. B. LITTLE ET AL 1,370,059

BOILER Filed May 27, 1929 5 ShGetS SheQc 1 INVENTORS (ZAkEA/(E .9.4/7745 #144751? .1. 6 4/14. M/

AT TORNEY g- 1932- c B. LITTLE ET AL 1,870,059

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ATTORNEYS Aug. 2, .1932. c. B. LITTLE ET AL 1,870,059

BOILER Filed May 27, 1929 5 Sheets-Sheet 3 ATTORNEYS Aug. 2, 1932- c. B.LITTLE ET AL' BOILER Filed May 27, 1929' 5 Sheets-Sheet 4 ATTORNEY;

Aug. 2, 1932. c. B. LITTLE ET AL BOILER Filed May 27, 1929 5Sheets-Sheet 5 ATTQBNEYQ Patented Aug. 2, 1932 NirEn STATES.

PATENT. OFFIC CLARENCE LITTLE AND WALTER HAAG,-OF DAYTON, OHIO, ASSIGNORTO THE BROWNELL COMPANY, OE DAYTON, OHIO, A CORPORATION OF OHIO BOILERApplication filed May 27,

Thisinvention relates to boilers.

It is the object of the invention to provide a boiler having aself-supporting crown sheet and an arch brace.

It is a further object to provide a tapering water leg, one wall ofwhich is formed of a continuous sheet with the boiler, with the archbrace sheet forming the bottom of the boiler between the outside wallsof the water leg.

It is a further object to provide a boiler in which the arch brace is soarranged as to provide free circulation of water therethrough from theboiler to the water leg and vice versa. while, at the same time,securing the present effect and rigidity consequent upon the use of thebottom sheet of the boiler extending from side to side of the boiler.

It is a further object to provide a'boiler in which the radiant surfacegiving greater evaporation'is materially increased by providing watertubes communicating with the water legs and by providing extracirculation through the fire boX and fire tubes.

It is the object of the invention to provide a boiler which eliminatesall rivets, bolts and other attaching means and which can be formed intoa single continuous integral body by weldingof the parts together whichare so arranged to have sufiicient strenth by reason of theirconstruction to permit of the elimination of stay bolts and rivets.

Reterringto the drawings:

Figure 1 is a perspective of the boiler partially broken away to showthe arrangement of the successive walls and pipes F igure 2 is a sideelevation, a portion of which is cut away on a vertical plane to show Insection the arrangement of the parts;

Figure 3 is a front elevation with the front wall of the boiler brokenaway to show the arrangement of the water leg and arch brace;

Figure 4 is a rear elevation partially broken away to show thearrangement of the wa ter leg and fire box;

Figure 5 1s a section on the line 55 or" Figure 3 showing 1n plan thearrangement of the arch brace.

Referring to the drawings in detail, 1 is the foundation for the boileron which the i 1929. Serial 1%. 366,239.

That portion, which is composed of the sides H and top of the boiler isdesignated 6, but it will be understood. that the portions 5 and 6 are asingle, continuous sheet.

Mounted between the legs of this continuous sheet and engaging theinside of such legs 5 at the top of the water legs 4 is'an arch bracesheet 7 welded at 8 to the inside of the. sheet having the portions 5and 6. Over the water leg itself on the side are located a plurality ofstaggered apertures 9 in this arch v brace sheets 7 to permit of freecirculation between the boiler and thewater legs i.

The inside of these side water legs is formed by the sheets 10 which arewelded at 11 to the arch brace sheet 7 and are attached at the bottom bythe plates 12 to the outside wall 5 of the leg. Braces 13 serve to spacethe walls 5'and 10 which are progressively spaced turt-her and furtherfrom one another as the leg rises towards the boiler.

Communicating with the fore and aft water legs 2 and 3 are the heatingpipes 1 through which water circulates.

Mounted in the front wall 15 and the rear wall 16 of the boiler are firetubes 17 through M which the heat circulates before it makes its exitthrough the stack at 18, 19 indicates the usual grate, 20 the fire boxand 21 the ash door.

Theheat pipes are located to convey water between the water legs as at22.

'T he walls 8a are straight, forming a rigid brace.

It will be understood that we desire to comprehend within our inventionand within the scope of our claims such modifications as may be fairlycomprehended within such claims and invention due to necessarymodifications to adapt our invention to varying conditions or" use andto varying purposes.

Having thus fully described the invention,

what is claimed as new and desired to secure by Letters Patent, is:

1. In a boiler, the combination of a continuous sheet forming the insideand outside of side water legs and the sides and top of the boiler, anarcuate arch brace sheet forming the crown sheet of the boiler weldedalong its edges to the interior of the first mentioned sheet and weldedto the top of the inside sheets of the water legs with the part of thesheet between the welds being straight and having apertures in saidstraight part for circulation between the legs and the boiler, wherebywhen the structure is assembled and welded it forms a continuousintegral braced structure without rivets or bolts, and bracestransversely arranged between the walls of the water legs formed by saidcontinuous sheet.

2. In a boiler, the combination of a continuous sheet forming the insideand outside of side water legs and the sides and top of the boiler, anarcuate arch brace sheet forming the crown sheet of the boiler welded tothe interior of the boiler sides and welded to the top of the insidesheets of the water legs so that the parts of the arch brace between thewelds are straight and having apertures for said water legs forcirculation between the legs and the boiler, whereby when the structureis assembled and welded it forms a continuous integral braced structurewithout rivets or bolts, and braces transversely arranged between thewalls of the water legs formed by said continuous sheet, said water legsbeing progressively larger from the bottom to the top.

3. In a boiler, the combination of a continuous sheet forming the insideand outside of side water legs and the sides and top of the boiler, asecond sheet of arcuate form forming the bottom of the boiler resting onthe inside sheet of the water legs at substantially right angle theretoand engaging at its ends the inside of the outside sheet of the waterlegs, said arcuate sheet over the water legs being straight and havingapertures for water circulation, front and end water legs cooperatingwith the front and end walls of the boiler, fire tubes between saidfront and end walls, a portion of which communicate with the fire box ofthe boiler and others of which communicate with the stack, overhangingfore and aft heat circulation chambers communicating with the lire box.

4. In a boiler, the combination of a continuous sheet forming the insideand outside of side water legs and the sides and top of the boiler, asecond sheet of arcuate form forming the bottom of the boiler resting onthe inside sheet of the water legs and engaging at its ends the insideof the outside sheet of the water legs, said arcuate sheet between theinside and the outside of each water leg being straight and havingapertures over the water legs for water circulation, front and end waterlegs cooperating with the front and end walls of the boiler, fire tubesbetween said front and end walls, a portion of which communicate withthe fire boX of the boiler and others of which communicate with thestack, overhanging fore and aft heat circulation chambers communicatingwith the fire box, and water tubes connecting the front and rear waterlegs located across the fire box.

5. In combination in a boiler of a boiler wall forming the top and sidesthereof, and an arcuate arch brace wall located therebetween to form thebottom of the boiler, the ends of said arch brace wall being fiat anappreciable distance from their point of juncture with the top and sidewall of the boiler, water legs for said boiler, said flat portions ofthe arch brace wall extending over said water legs and attached theretoand having circulation apertures through said flat portions.

6. I11 combination in a boiler of a boiler wall forming the top andsides thereof, and an arcuate arch brace wall located therebetween toform the bottom of the boiler, the ends of said arch brace wall beingflat an appreciable distance from their point of juncture with the topand side wall of the boiler, water legs for said boiler, said flatportions of the arch brace wall extending over said Water legs andattached thereto and having circulation apertures through said flatportions, said water legs being arranged of greater width at the topthan at the bottom.

In testimony whereof, we atliX our signatures.

CLARENCE B. LITTLE. WALTER J. I-IAAG.

